The marks obtained by raja in maths, physics and chemistry are in the ratio 2: 3: 4. If the total marks that- raja obtained in these three subjects is 189, how many marks did raja score in maths?
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let the marks be
2x (maths)
3x (physics)
4x (Chem.)
total marks = 2x + 3x + 4x = 9x
so
9x = 189
x=21
therefore marks are
maths 2x = 2*21=42
similarly
physics 3*21=63
chemistry 4*21=84
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